<!--
 * @Author: jswang
 * @Date: 2021-07-11 10:09:54
 * @LastEditTime: 2021-07-11 15:01:20
-->
<template>
  <el-container class="home-container">
    <!-- 头部 -->
    <!-- 组件名称就是一个类名 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <!-- 是否折叠,isSollapse 为true 折叠 反之 不折叠 -->
      <el-aside :width="isSollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <!-- 一级菜单 -->
        <el-menu
          background-color="#383e4a"
          text-color="#fff"
          active-text-color="#3ca2ff"
          unique-opened
          :collapse="isSollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
        <!-- 这里index接收一个字符串,返回的数据是一个数字 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span v v-cloak>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
              <!-- 二级级菜单模板区 -->
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span v-cloak>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  //组件的私有数据
  data(){
    return{
      // 左侧菜单栏
      menulist:[],
      iconObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      isSollapse:false,
      //被激活的连接地址
      activePath:''
    }
  },
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      // 清空sessionStorage
      window.sessionStorage.clear()
      // 通过编程式导航跳转到后台主页，路由地址是 /login
      this.$router.push('/login')
    },
    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      //状态不是200就获取菜单列表失败
      if(res.meta.status !== 200) return this.$message(res.meta.msg)
      this.menulist = res.data
    },
    toggleCollapse(){
      this.isSollapse = !this.isSollapse
    },
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath = activePath;
    }
  },
}
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #3d4347;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #383e4a;
  .el-menu{
    border-right: none;
  }

}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right:10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor:pointer;
}
</style>
